Hey everyone I just needed some help with something that has been going on for a while. My mustang has been making a weird noise and I don't know what it is. When I had my factory cold air intake on it, it made this like blooping noise. Almost like a milk jug when you pour water out to fast and the bottle flexes and makes that noise. Almost like a glug noise. I now have an aftermarket cold air intake and cant hear it from there anymore but if I stand behind the car you can hear like a glug or maybe a misfire in the exhaust. It doesn't happen the hole time its running but every once in like every 30 or so seconds you can hear it. It drives the same as it always has and I never lost any power I just don't know what the noise is. Please help!